Primary breaker



Dec. 16. 1924- 1,519,625

A. L. MUNRO ET ALv PRIMARY BREAKER Filed Oct. 15. 1923 i 1\ 4172067260735. JZZexmzcZerLJfwzra flarve y ff. Rum v62, a 4

Patented Dec, 15, 1924.

ALEXANDER In IEUNRO AND HARVEY H.

RUMPEL, OF IEILWAUKEE, 'WISOONSIN,

FATE

A! SIGNORS T0 SMITH ENGINEERING WORKS, OE MILWAUKEE, WISCONSIN, A

CGRPORATION OF WISCONSIN.

PRIMARY BREAKER.

Application filed October 15, 1923. Serial No. 668,485.

To (41!. who/12' it may concern-t Be it known that we rrnuraxnnn L. MUN-no and Hat-wry H. BUMPEL, citizens of the Dominion of Canada and of theUnited States. respectively. the former a subject of the King of GreatBritain, both residing at Milwaukee. in the county of fiflilwaukee andState of lt isconsiin have im ented a certain new and useful improvementin Primary Breakus, of which the following is a specification.

Our invention relates to improvements in gyratory crushers and has forone object to produce a simple and efiicient lubricating means for sucha crusher. Another object is the improvement of bearings of such acrusher. Another object is the improvement of the head adjustment ofsuch a crusher. Uther objects will appear from time to time in thecourse of the specification and claims.

We illustrate our invention more or less diagrannnatically in theaccon'ipanying drawings, wherein:

Figure 1 is a vertical view through the machine; and

Figure 2 is a section on the line 22 of Figure 1.

Like parts are illustrated by like characters throughout the drawingsand specification.

A is a crushing hopper mounted on a base A and provided on its interiorwith a crushing lining A the whole being mouned upon a foundation A A isa lower spider secured to the base and in this instance integral withthe base of the crusher and adapted to support the central shaft A whichis secured to it and supported at its upper end by the upper spider Awhich is integral wth the feed hopper A secured to the crusher hopper Aby the bolts if.

B is a driving shaft upon which is 1nount ed the belt pulley B adaptedto be driven by any suitable source of power not here shown. B is amiter pinion'on the shaft B rotating in the oil pocket B It is in meshwith the miter gear B keyed to the eccentric sleeve which in turn ismounted for rotation about the fixed central shaft A and is supported atits lower end upon the thrust hearing 13. B is a miter gear keyed to theshaft 13 and meshing with the meter gear B on the vertical pump shaft Bwhich communicates with the pump not herein shown, which is adapted todeliver lubricant to the crusher. B is a return passage from the oilpocket B to said pump. 7

C is a crushing head floating upon the eccentric sleeve B. It isprovided with a depending stem or shank portion C which fitsinside andis slidably keyed to the adjustment plate C and terminates above themiter gear B earlier mentioned. The adjustment plate C is mounted uponthe supporting ring or table which in turn is mounted upon the lowerspider A. C, (7" is any suitable packing or channelling to prevent oilleakage between said plate and table. C C are supporting bracketsprojecting upwardly from the surface of the adjustment plate C and areprovided with dowel holes C They are adapted to receive adjusting shimsC of varying thicknesses, which in turn are provided with dowels Cadapted to penetrate said holes C Upon the upper surfaces of said shimsrests the under surface C of the crushing head C. C, C are port-holeswith gates C C giving easy access to the adjusting ring and shims.

D is a main lubricating supply pipe lead ing from a pump not here shown,to the lower bearing of the central shaft A D is an inwardly taperedbushing or sleeve, the inner surface of which is adapted to contact thetapered reduced end D of said central shaft. The sleeve is secured inposition by means of the plate D which con tacts its bottom, and isdrawn against the shaft by the bolt 1), which is screw threaded into thebottom of said shaft, and the nuts D D is any suitable protectingcasing. Said sleeve is apertured as at D at substantially the height ofthe inlet of the oil pipe D. At the same height the interior of theframe is circumfercntially grooved as at D and the tapered portion ofthe central shaft A is circumfcrentially grooved as at D D is alubricating supply pipe adapted to deliver lubricant to the chamber Dabout the shaft B.

The crushing head C is provided at its top with a packing ring F, thebottom of which engages a packing surface E on the top of said crushinghead, adapted to make a substantially oil tight joint. The pres sure isexerted upon the packing ring to assist in the oil tightness of thisjoint by means of the screws E which insure a firm fitting of thepacking ring on the upper end of the crushing head.

The center shaft A is axially piercedby a central oil passage G whichextends from the bottom of the shaft to a point near the top, the bottomof said passage being closed, for example, by the bolt D earlier men--tioned. ()il inlet ducts G extend from said passage to the slot D. Oiloutlet ducts G Gr radiate from said passage G at various points alongthe length of the shaft. The eccentric sleeve G is pierced by similaroil passages G G Between the central shaft and the eccentric and betweenthe eccentric and the crushing head are babbitt sleeves or bearings eachof which consists of two staves or substantially semi-cylindricalsegments, respectively shown in Figure 2 as H, H and H H Each segment isformed with an integral key H received in a corresponding recess,adapted to prevent rotation of the hearing as a whole and relativemovement of the two halves of the bearing. The staves are provided withoil holes H, H in opposition to the oil passages G i G, G earlierdescribed.

The babbitt segments H H are supported at the bottom by the shoulder 13inwardly projecting from the bottom of the eccentric sleeve. Theyareheld at the top by a snap ring B seated in a circumferential groove Bin the top of the eccentric sleeve. The babbitt segments H H may besimilarly held in place, for example by the circumferential shoulder Cprojecting inwardly about the bottom of the head C and any suitable ringabout the top of the head.

I is a downwardly and outwardly inclined oil duct through the shankportion C of the crushing head which terminates in alignment with thepassage or opening I in the adjustment plate G I is a down wardly andinwardly inclined oil passage through the supporting ring or table Cadapted to. deliver any oil which passes over the surface of said tableto the oil pocket 13*.

J is an adjusting saddle adapted to be aligned with the top of thecentral shaft A and to be supported upon the lock nut at the topthereof. It is provided with depending hook bolts J the lower hook endsJ of which are adapted to be hooked under the edges of the crushinghead. J 3 are nuts, the rotation of which is adapted to raise or lowerthe hook bolts J in relation to the yoke or saddle J.

The counter shaft is mounted for rotation in bearings K, K which areeach cast with an integral key which fits into a key seat cut in thecounter shaft sleeve Y It will be. realized that while we haveillustrated a working device, many changes might be made in the size,shape, number and disposition of parts without departing from the spiritof our invention and we therefore wish our description and drawings tobe taken in a large sense diagrammatic.

The use and operation of our invention are as follows:

The material to be crushed is fed into the crusher through the feedhopper from above and passes into the crushing hopper where it iscrushed by the gyration of the crushing head. The crushed material as itbecomes small enough falls out at the bottom through the aperturebetween the crushing head and holes. lVhen shims of the proper thicknesshave been placed on all of said platforms, the crushing head may belowered'into position. This method of head adjustment insures anaccurate alignment of the head, since the position of the head may beabsolutely controlled by controlling the thick ness of the shims. Thisaccurate alignment insures equal pressure on the babbitt bearingsbetween head and eccentric and between eccentric and central shaft.Where other and less accurate methods of adjustment are used crackingand wearing of the babbitts is common as a result of an inaccuratealignment of the head splitting the babbitt. This accurate alignment ofthe head also prevents oil leakage from about the top of the head. Thisis particularly important since the lubricant is pumped under pressurethrough the central shaft and the pressure of the lubricant togetherwiththe centrifugal motion given it by the rotation of the eccentricmakes oil leakage a vital problem.

A pump driven from the shaft B circulates oil under pressure through thecrusher, the lubricant passing through the pipe D to the bottom of thecentral shaft where it communicates with the circumferential groove DThis groove is aligned as to height with the groove D about the taperedbottom of the shaft. The tapered bearing or sleeve D is apertured at thesame height as the two circumferential grooves and the adjustment ofsaid bearing is therefore automatic, since all that is necessary is toinsert it between the tapered bottom of the shaft and the cylindricalsocket in the spider into which it fits. In the past it has beennecessary to make a careful adjustment of the oil passage inlet with theparts or passages in the central shaft with which it communicates.Applicants structure avoids these difliculties and makes it impossiblefor even the most unskilled laborer to assemble applicants crusherwithout keeping the oil inlet passage open. The oil passing about theslot D through the passage D and into the passage D then finds its waythrough the inlet passages G to the main axial oil passage G, running upthrough the center of the central shaft. Branch distribution passagesG", G deliver the lubricant to the bearing surfaces and the pasages G Gto the eccentric carry the lubricant to the outer bearing between theeccentric and the head; the head being accurately aligned and adjusted,the sleeve E may be compressed by the screws E against the packingsurface E and leakage issubstantially completely prevented. Thelubricant drains down into the oil pocket B and is drawn tl'irough thepassage B back to the pump where it :is settled and filtered by anysuitable means not herein shown and subsequently returned under pressureto the crusher.

The eccentric rotates between babbit-t bearings or sleeves, each ofwhich is composed of two substantially semi-cylindrical segments orstaves; each of said segments is provided with an axial key which isreceived in a corresponding aXial groove in the crushing head and theeccentric respectively as shown in Figure 2. It will be noted that thekeys and key ways are positioned at the point of minimum throw. This isparticularly important since it prevents a concentration of pressure atthe key and prevents the splitting of the babbitt down the key, the keybeing the point of greatest danger of splitting of the babbitt staves.The keys hold the individual segments firmly in position and as they arecast with properly located oil holes, the oil passages H are accuratelyaligned with the lubricant pasages G G in the eccentric.

We claim:

In a crusher, a hopper, a central shaft, and a crusher head, adapted foreccentric motion thereabout, and a babbitt bearing intermediate thecentral shaft and the crusher head comprising a pair of substantiallysemi'cy"ndrical sections, each section being formed with an integrallongitudinal. key.

In a crusher, a hopper, a central shaft, and a chnsher head adapted foreccentric motion thereahout, and a bearing comprising a pair ofsubstantially semi-cylindrical sections, each so .lUll being providedwith a longitudinal l'ey substantially removed circumferentially fromthe point of maximum ti 1 r ow.

:3. In a usher, a hopper, a central shaft, and means for supporting it,an eccentric mounted about said shaft and means for rotating it, acrusher head floating on said shaft about said eccentric, and babbittbearmgs intermediate the central shaft and the crusher head comprising apair of substantially semi-cylindrical sections, each. section beingformed with an integral longitudinal key.

in a crusher, a hopper, a central shaft, and means for supporting it, aneccentric mounted about said shaft and means for rotating it, a crusherhead floating on said shaft about said eccentric, and bearings betweenshaft and eccentric comprising a pair of substantially semi-cylindricalsections, each section being provided with a longitudinal keysubstantially removed circumferentially from the point of maximum throw.

In a crusher, a hopper, a central shaft, and means for supporting it,an, eccentric mounted about said shaft and means for rotating it, acrusher head floating on said shaft about said eccentric, and babbittbearings between said shaft and said eccentric, and said eccentric andsaid head, comprising each a pair of substantially semi-cylindricalsections, each section being formed with an integral longitudinal key.

6. In a crusher, a hopper, a central shaft, and means for supporting it,an eccentric mounted about said shaft and means for rotating it, acrusher head floating on said shaft about said eccentric, and bearingsbe tween said shaft and said eccentric, and said eccentric and said headcomprising each a pair of substantially semi-cylindrical sections, eachsection being provided with a longitudinal key, the keys of the bearingbetween the shaft and eccentric being substantially removedcircuinferentially from the point of maximum throw.

7. In a crusher, a hopper, a central shaft, and means for supporting it,an eccentric mounted about said shaft, and means for rc-- tating it, acrusher head floating on said shaft about said eccentri and bearingsbetween said head and said eccentric comprising a pair ofseini-cylindrical babbitts, each separately keyed to the inside wall ofsaid head.

8. In a crusher, a hopper, a central shaft and means for supporting it,an eccentric mounted about said shaft, and means for rotating it, acrusher head fl ating on said shaft about said eccentric, and bearingsbetween said head and said eccentric comprising a pair ofsemi-cylindrical babbitts, and a longitudinal key extendingsubstantially from end to end of each of said babbitts, the inside wallof said head being channelled to receive them.

9. In a crusher comprising a hopper, a central shaft and means forsupporting it, a crushing head mounted on said shaft and means forvertically adjusting and for aligning it, comprising an element adaptedto support the crushing head, a plurality of shim supporting padsupwardly projecting from said element and spaced thereabout and aplurality of independent adjustable shims spaced about said element andposi tioned upon said pads and interposed between them and the crushinghead, the crushcentral shaft and means for supporting it,

- a crushing head mounted on said shaft, and

means for vertically adjusting and aligning it, comprising a ringadapted to support the crushing head, shim supporting pads upon theupper side of said ring and projecting a substantial distancethereabove, and a plurality of adjustable shims interposed between saidpads and the crushing head, the said shims being fixed by dowel pinsagainst lateral movement in relation to said pads.

11. In a crusher comprising a hopper, a central shaft and means forsupporting it, a crushing head mounted. on said shaft, and means forvertically adjusting and aligning it comprising a ring adapted tosupport the crushing head, shim supporting pads upon the upper side ofsaid ring and projecting a substantial distance thereabove, located at aplurality of separate points about the circumference of said ring, and aplurality of adjustable shims adapted to be interposed between said padsand the crushing head.

12. In a crusher comprising in part a hopper, a fixed central shaft, arotating eccentric and a crushing head mounted about said eccentric, anda shaft and a driving connection between said shaft and said ec centric,babbitt bearings between said shaft and head comprising a plurality ofsubstantially cylindrical bushings, keys formed integrally therewith andadapted to prevent their rotation.

13. In a crusher comprising in part ahopper, a fixed central shaft, arotating eccentric and a crushing head mounted about said eccentric, anda shaft and adriving connection between said shaft and said eccentric,bearings for said shaft comprising a plurality of substantiallycylindrical bushings, keys cast integrally therewith and adapted toprevent their rotation, and means for lubricatingsaid bushingscomprising an oil inlet passage intermediate said bushings and an oilconnection between it and each of said. bushings.

14. In a crusher, a hopper, a central shaft, and a crusher head adaptedfor eccentric motion thereabout, and a bearing comprising a pair ofsubstantially semi-cylindrical sections, each section being providedwith a longitudinal key at least twenty-five degrees circumferentiallyremoved from the point of maximum throw.

15, In a crusher, a hopper, a central shaft and means for supporting it,an eccentric mounted about said shaft and means for ring mounted thereinand adjustable means for holding said ring against the top of said head,and means for vertically adjusting and aligning said head, comprising aring adapted to support it, shim supporting pads on the upper side ofsaid ring and projecting upwardly a substantial distance from thesurface thereof and a plurality of adjustable shims interposed betweensaid pads and the crushing head, the crushing head eX- tendingdownwardly through said supporting element and depending substantiallytherebeneath.

17. In a crusher comprising'a hopper, a central shaft and means forsupporting it. a crushing head mounted on said shaft, and a spideroverlying said head, a telescoping ring mounted therein and adjustablemeans for holding said ring against the top of said head, and means forvertically adjusting and aligning said head comprising a ring adapted tosupport it, shim supporting surfaces'on the upper side of said ring anda plurality of adjustable shims interposed be tween said surfaces andthe crushing head, and a downward projection from said head passingthrough and depending beneath said supporting ring.

18. In a crusher, a hopper, a central shaft and a crusher head adaptedfor eccentric motion thereabout, and a bearing comprising a pair ofsubstantially semi-cylindrical sections, each section being providedwith a longitudinal key, the interior of the head being aperturedtoreceive said keys, a shoul der inwardly projecting about the bottom ofsaid head and adapted to support said sections, and a removable securingmeans about the top of said head.

19. In a crusher, a counter shaft and means for rotating it, a sleevewithin which said shaft is mounted for rotation, a bearing mountedtherein, a key integral with said bearing, the sleeve being slotted toreceive said key.

Signed at Milwaukee, Wisconsin this 26th day of September, 1923.

